feat: Evotor + VK catalog sync, connections, and store/group filters

- Evotor catalog: background Celery task syncing stores/groups/products
  from Evotor API; UI pages with per-store and per-group sync toggles
- VK connection: manual token + group ID entry with inline test button
- Evotor connection: inline test button (calls /stores)
- VK catalog: background task syncing VK Market albums and products;
  separate catalog UI at /vk-catalog/albums
- SyncFilter extended to support entity_type=group with parent_entity_id
- Migration 0004: vk_cached_albums + vk_cached_products tables
- Beat schedule updated to run both refresh_catalog and refresh_vk_catalog
- README updated with new schema, routes, tasks, and config

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/main.py

@@ -35,6 +35,9 @@ from web.routes.invite import router as invite_router  # noqa: E402
 from web.routes.profile import router as profile_router  # noqa: E402
 from web.routes.evotor_webhooks import router as evotor_webhooks_router  # noqa: E402
 from web.routes.admin import router as admin_router  # noqa: E402
+from web.routes.catalog import router as catalog_router  # noqa: E402
+from web.routes.connections import router as connections_router  # noqa: E402
+from web.routes.vk_catalog import router as vk_catalog_router  # noqa: E402
 
 app.include_router(auth_router)
 app.include_router(reset_router)
@@ -42,6 +45,16 @@ app.include_router(invite_router)
 app.include_router(profile_router)
 app.include_router(evotor_webhooks_router)
 app.include_router(admin_router)
+app.include_router(catalog_router)
+app.include_router(connections_router)
+app.include_router(vk_catalog_router)
+
+
+# ── Catalog redirect ─────────────────────────────────────────────────────────
+@app.get("/catalog")
+async def catalog_redirect():
+    from fastapi.responses import RedirectResponse
+    return RedirectResponse("/catalog/stores", 302)
 
 
 # ── Health ────────────────────────────────────────────────────────────────────